| A | B |
| artist | a person skilled at a task, particularly someone skilled at creating art |
| artwork | paintings, drawings or other artistic words done by a skilled artist |
| artisan | a worker skilled in an artistic trade (pottery, weaving, metalwork etc) |
| artifact | an object of cultural or historical interest that was skillfully made |
| asteroid | a rock orbiting our star, the sun |
| asterisk | a symbol that looks like a star * |
| astronaut | a person who is trained to travel in space |
| astronomer | a person who studies the stars and other objects in space |
| audible | able to be heard |
| inaudible | not able to be heard |
| audience | a group of people that gather together to hear an event |
| audition | an interview where a judge can hear or see the participant's skill |
| auditorium | part of a theater where the audience sits to hear the performance |
| audiology | a branch of science concerned with hearing |